In: Journal of Hydrology and Hydromechanics, vol. 66, no. 2
Vakhtang Shelia - Jirka Šimůnek - Ken Boote - Gerrit Hoogenbooom
Detaily:
Rok, strany: 2018, 232 - 245
Kľúčové slová:
System Modeling; Crop Growth; Soil water; Unsaturated zone; DSSAT; HYDRUS-1D.
URL originálneho zdroja: http://www.ih.sav.sk/jhh
O článku:
Accurate estimation of the soil water balance of the soil-plant-atmosphere system is key to determining the
availability of water resources and their optimal management. Evapotranspiration and leaching are the main sinks of
water from the system affecting soil water status and hence crop yield. The accuracy of soil water content and evapotranspiration
simulations affects crop yield simulations as well. DSSAT is a suite of field‐scale, process‐based crop models
to simulate crop growth and development. A “tipping bucket” water balance approach is currently used in DSSAT for
soil hydrologic and water redistribution processes. By comparison, HYDRUS-1D is a hydrological model to simulate
water flow in soils using numerical solutions of the Richards equation, but its approach to crop-related process modeling
is rather limited. Both DSSAT and HYDRUS-1D have been widely used and tested in their separate areas of use. The
objectives of our study were: (1) to couple HYDRUS-1D with DSSAT to simulate soil water dynamics, crop growth and
yield, (2) to evaluate the coupled model using field experimental datasets distributed with DSSAT for different
environments, and (3) to compare HYDRUS-1D simulations with those of the tipping bucket approach using the same
datasets. Modularity in the software design of both DSSAT and HYDRUS-1D made it easy to couple the two models.
The pairing provided the DSSAT interface an ability to use both the tipping bucket and HYDRUS-1D simulation
approaches. The two approaches were evaluated in terms of their ability to estimate the soil water balance, especially soil
water contents and evapotranspiration rates. Values of the d index for volumetric water contents were 0.9 and 0.8 for the
original and coupled models, respectively. Comparisons of simulations for the pod mass for four soybean and four peanut
treatments showed relatively high d index values for both models (0.94–0.99).
Ako citovať:
ISO 690:
Shelia, V., Šimůnek, J., Boote, K., Hoogenbooom, G. 2018. Coupling DSSAT and HYDRUS-1D for simulations of soil water dynamics
in the soil-plant-atmosphere system. In Journal of Hydrology and Hydromechanics, vol. 66, no.2, pp. 232-245. 0042-790X (until 2019) .
APA:
Shelia, V., Šimůnek, J., Boote, K., Hoogenbooom, G. (2018). Coupling DSSAT and HYDRUS-1D for simulations of soil water dynamics
in the soil-plant-atmosphere system. Journal of Hydrology and Hydromechanics, 66(2), 232-245. 0042-790X (until 2019) .